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SPLIT-TYPE AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type
Model
MS-GD80VB -
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
E1
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 2
3. SPECIFICATION ················································ 3
4. NOISE CRITERIA CURVES ······························ 3
5. OUTLINES AND DIMENSIONS ························ 4
6. WIRING DIAGRAM ············································ 4
7. REFRIGERANT SYSTEM DIAGRAM ··············· 5
8. SERVICE FUNCTIONS ····································· 6
9. MICROPROCESSOR CONTROL ····················· 8
10. TROUBLESHOOTING ····································· 14
11. DISASSEMBLY INSTRUCTIONS ···················· 23
PARTS CATALOG (OBB511)
Revision A:
• Another type of the electronic control P.C.
board (TYPE 2) has been added to the
original one (TYPE 1). They are both com-
patible with MS-GD80VB-
E1
Please void OBH511.
No. OBH511
REVISED EDITION-A
Outdoor unit service manual
MU-GD•VB Series (OBH512)
.
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Related Manuals for Mitsubishi Electric MS-GD80VB-E1
Summary of Contents for Mitsubishi Electric MS-GD80VB-E1
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Page 1: Table Of Contents
Revision A: • Another type of the electronic control P.C. board (TYPE 2) has been added to the original one (TYPE 1). They are both com- SPLIT-TYPE AIR CONDITIONERS patible with MS-GD80VB- Please void OBH511. INDOOR UNIT No. OBH511 SERVICE MANUAL REVISED EDITION-A Wireless type Model... -
Page 2: Technical Changes
Use the specifi ed refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. -
Page 3: Specification
SPECIFICATION Indoor model MS-GD80VB Cooling Function Single phase Power supply 230 V, 50 Hz Breaker capacity Running current 0.34 Power input Power factor RC4V40-AA Model Fan motor current 0.34 Dimensions W × H × D 1,100 × 325 × 258 Weight Air direction 954/822/684... -
Page 4: Outlines And Dimensions
OUTLINES AND DIMENSIONS MS-GD80VB Unit: mm Installation plate Indoor unit 1068 414.5 414.5 Wall hole ø75 1100 Liquid line ø 9.52- 0.5 m Air in Installation plate Gas line ø 12-0.43 m Insulation ø 50 O.D ø 32 I.D Drain hose ø 16 (Connected part O.D) Air out Insulation ø... -
Page 5: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM MS-GD80VB Unit: mm Refrigerant pipe ø15.88 (with heat insulator) Indoor coil Indoor thermistor heat RT12(main) exchanger Flared connection Indoor coil thermistor RT13(sub) Room temperature thermistor RT11 Strainer Flared connection Refrigerant pipe ø9.52 (with heat insulator) Refrigerant flow in cooling OBH511A... -
Page 6: Service Functions
SERVICE FUNCTIONS MS-GD80VB 8-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. (Refer to 10-6.) The time will be shortened as follows. Set time: 1 minute 1-second Set time: 3 minute 3-second (It takes 3 minutes for the compressor to start operation. - Page 7 8-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” automatically starts operation in the same mode just before the shutoff of the main power. However if the unit is operated in “I FEEL CONTROL” mode before power failure, the operation is not memorized.
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Page 8: Microprocessor Control
MICROPROCESSOR CONTROL MS-GD80VB WIRELESS REMOTE CONTROLLER Signal transmitting section Operation display section OPERATE/STOP (ON/OFF) button ON/OFF WARM COOL TEMPERATURE buttons ON/OFF WARM COOL VANE button FAN SPEED CONTROL button (Horizontal vane button) STOP I FEEL COOL OFF-TIMER button VANE START ON-TIMER button MODE WIDE VANE... - Page 9 9-1. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons. (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 16 ~ 31˚C Indoor fan continues to operate regardless of thermostat's OFF-ON at set speed.
- Page 10 (4) The initial set temperature is decided by the initial room temperature. Model Initial room temperature Initial set temperature 26˚C or more 24˚C COOL mode of " I FEEL CONTROL" 25˚C to 26˚C Initial room temperature minus 2˚C DRY mode of more than 13˚C, less than 25˚C Initial room temperature minus 2˚C "...
- Page 11 (3) Positioning To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the desired angle. Confirming of standard position is performed in the following case: (a) When the power supply turns ON. (b) When the operation starts or finishes (including timer operation).
- Page 12 2. Vertical vane (1) Vane motor drive These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approximate 12 V) transmitted from microprocessor. (2) The vertical vane angle and mode change as follows by pressing WIDE VANE button. (3) Positioning To confirm the standard position, the vane moves until it touches the vane stopper.
- Page 13 PROGRAM TIMER • OFF timer and ON timer can be used in combination. • " " and " " display shows the order of OFF timer and ON timer operation. (Example 1) The current time is 8:00 PM. The unit turns OFF at 11:00 PM, and ON at 6:00 AM. (Example 2) The current time is 11:00 AM.
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Page 14: Troubleshooting
TROUBLESHOOTING MS-GD80VB 10-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following: (1) Check the power supply voltage. (2) Check the indoor/outdoor connecting wire for mis-wiring. 2. Take care the following during servicing. (1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, and after confirming the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug. - Page 15 10-2. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit Indoor unit Indoor unit OPERATION INDICATOR operates. operates. does not receive lamp on the indoor unit is Outdoor unit Outdoor unit the signal from flashing ON and OFF. does not does not operate remote controller.
- Page 16 10-3. TROUBLESHOOTING CHECK TABLE • Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and the following detection method has detected an abnormality (the first detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with the OPERATION INDICATOR lamp flashing.
- Page 17 10-4. TROUBLE CRITERION OF MAIN PARTS MS-GD80VB Figure Part name Check method and criterion Room temperature Measure the resistance with a tester. (Part temperature 10°C ~ 30°C) thermistor (RT11) Indoor coil thermistor Refer to 10-6."Test point diagram and voltage", (RT12 (main), RT13 (sub)) "Indoor electronic control P.C.
- Page 18 Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller. Check of remote controller and receiver P.C. board Check if the remote controller is exclusive for this air conditioner. Press OPERATE/STOP (ON/OFF) button on the remote controller. Is LCD display on the remote con- Replace the batteries (Refer to 10-1.4.).
- Page 19 The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp does not light up by pressing the EMERGENCY OPERATION switch. Check of indoor electronic control P.C. board Check the both “parts side” and “pattern Varistor (NR11) side” of indoor electronic control P.C. board visually.
- Page 20 When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. How to check mis-wiring Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self -check to be displayed in 3 seconds. Start •...
- Page 21 10-6. TEST POINT DIAGRAM AND VOLTAGE MS-GD80VB NOTE: There are two types of electronic control P.C. Indoor electronic control P.C. board boards (TYPE 1/TYPE 2). They are both compatible with MS-GD80VB TYPE 1 Fan motor power supply (CN211) Power supply input 230 V AC 5 V DC Room temperature...
- Page 22 MS-GD80VB Indoor electronic control P.C. board TYPE 2 Fan motor power supply (CN211) Power supply input 230 V AC Fuse (F11) T3.15AL250V 5 V DC R132 Room temperature thermistor (RT11) Indoor coil thermistor (RT12 (main)) Indoor coil thermistor (RT13 (sub)) 12 VDC CN121 Vane motor...
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Page 23: Disassembly Instructions
DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. - Page 24 OPERATING PROCEDURE PHOTOS Photo 3 Screws of the earth wire 3. Removing the electrical box (1) Remove the panel and the corner box. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Disconnect the connector of the indoor coil thermistor. (4) Disconnect the motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronic control P.C.
- Page 25 OBH511A...
- Page 26 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO., LTD Distributed in Aug. 2011. No.OBH511 REVISED EDITION-A Distributed in Apr. 2008. No.OBH511 6 New publication, effective Aug. 2011 Specifications subject to change without notice.
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